The family of one of the Disappeared, Peter Wilson, has confirmed that his body has been found at a beach in Co Antrim.
A search by the Independent Commission for the Location of Victims' Remains began in Waterfoot last week, 37 years after Mr Wilson went missing.
He was aged 21 when he disappeared from his home in West Belfast in August 1973.
John Hill, Investigator for the Commission, said information it received led to the discovery.
A spokesman for ICLVR said: 'The ICLVR in its search for the body of Peter Wilson has found human remains at a site in Waterfoot in Co Antrim.
'The recovery is ongoing and the formal identification process will take some time.
'The family of Mr Wilson and the Police Service of Northern Ireland have been informed.'
Mr Wilson's family believes the IRA was responsible for the murder although the organisation's leadership has never officially admitted the killing.
The Wilson family said: 'This is a special day for our family - Peter has been missing for 37 years. For 37 years, we have missed him and have often wondered what happened.'
Sinn Féin President Gerry Adams said: 'The reports that remains have been found at Waterfoot, Co Antrim, where the Commission have been searching for St James man Peter Wilson, is welcome news.
'My thoughts are with the Wilson family at this time and I would hope that confirmation would be speedy to ease the burden of the final wait the family will endure.
'I again would repeat my appeal that anyone with any information which might help other families locate remains and find closure should bring that information forward.'
The Independent Commission for the Location of Victims' Remains has had a number of successes in recent months.
The family of Gerry Evans - another of the Disappeared - are awaiting formal identification of remains discovered in Carrickrobin, Co Louth, last month.
In July, the body of Charlie Armstrong was found in bogland in Co Monaghan.
